Calculating-machine.



PATENTED MAR. 22, 1904.

J VBRMEHREN CALCULATING MACHINE. APPLICATION FILED 0013.30, 1902.

no lonnL.

UNITED STATES Patented March 22, 1904.

PATENT OFFICE.

CALCULATING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 755,084, dated March 22, 1904.

Application fi1ed October 30,1902.

To aZZ whom it may concern:

Be it known that I, J OI-IANNES VERMEHREN, head clerk, of Hellerup, near Copenhagen, in the Kingdom of Denmark, have invented certain new and useful Improvements in Calculating-Machines, of which the following is a specification.

This invention relates to calculating-machines; and it consists in the special construction and arrangement of a single cone on the surface of which the edges of a number of disk-shaped friction-disks are running, so that said disks are rotated when the cone is revolved. Each of the disks is mounted on a separate spindle, on which also a counting apparatus of known construction is mounted. The disks are to be placed in any desired position to said surface and can be adjusted to any desired distance from the apex of the cone, thereby varying the speed with which the disks, and consequently the corresponding counting apparatus, are rotated.

The accompanying drawings give a diagrammatical view of the improved calculatingmachine with two disk-shaped friction-disks.

Figure 1 shows the calculating-machine in a side elevation, and Fig. 2 shows the same in a plane view.

The cone (2 is revolved by means of the handle b. The two friction-disks Z Z are mounted on spindles 7c, (75.) Each spindle 7c (70) is journaled in a standard 2', (2",) which may be turned in any direction, being pivoted on a nut 72, (7%,) traveling on the screw (Z, ((Z.) The screws (Z (Z. are arranged parallel to the sloping surface of the cone and may be moved by handles 9 g, the nuts and therewith the disks Z Z being thus adjustabl y arranged along with the surface of the cone in such a manner that the contact-points of the disks with the cone can be set at any desired distance from the apex of said cone. This distance may be indicated by a hand 0, (0,) which is secured to the standard 2' (2 and points on a scale 1), (p.) The stems of the standards 2' may in a known manner be fastened when the frictiondisks Z Z are in the desired position in contact with the surface of the cone (2 and, for

- example, in the distances 2 2" from its apex.

When the handle 5 then is rotated, the two Serial No. 129,4:83. (No model.)

the two counting apparati m (m) will indicate values in the ratio of 2- 2-, the hands a, (a,)

secured to the standards 2, (2",) pointing on said counting apparati.

The multiplication of a figure with a fraction is easily performed by means of this calculating-machine, as it will be seen. If, for example, it is required to take eighteen and three-fourths per cent. of series of values that is to say, to multiply the values with seventy-five four-lnindredths (threesixteenths) the diskZ is placed so that 2- equals sixteen and the disk Z so that 2" equals three. The counting apparatus 212 then shows eighteen and three-fourths per cent. of the values indicated by the counting apparatus 222. It is obvious that the machine also may be used for performing divisions.

As remarked, the number of the disk-shaped friction-disks can be varied. If, for example, four such disks and corresponding counting apparati are used it is possible to indicate simultaneously with the one counting apparatus dollars and cents and with the other three the corresponding values in, for instance, marks, florins, and francs. The machine will thus be of the greatest advantage for moneychangers and bankers.

Having now particularly described the nature of my invention, I declare that what I claim is In a calculating-machine a revoluble coneshaped member, a number of disk shaped friction-disks having their edges in contact with the surface of said cone and being rotated by the revolving of it, spindles carrying said friction-disks and corresponding counting apparatus operatively connected with the spindles, and means for adjusting the disks lengthwise from the apex of the cone and means for placing the disks in any desired position to the sloping surface of the cone, substantially as set forth.

In witness whereof I have hereunto set my hand in presence of two witnesses.

JOHANNES VERMEHREN. Witnesses:

MAEcUs MoLLER, MAeNUs JENSEN. 

